Propeller



July 14, 1931. 1. KO'ENIG' 1,814,709 n PROPELLER Filed March 25, 1929 Y 0J gQ w/ @g2 /Z OIM/0% Patented July 14, 1931 UNITED stares retenir oFFicE JOSEPH KQENIG, or .Mfirrrrowod wisconsin; nnarus Konnte- AND RUBY K. ELLIS l ADMINISTRATORS OF SAD OSEH KOENIG, DIECZElSEI) rnornnrlnn Application led March 25, 1929. Serial No. 349,626.`

rlhis invention relatesto new and useful improvements in propellers.

One of the objects of my invention is the provision of a propeller which can be used equally as well either in water or for air and is so constructed that during the operation of the propeller the centrifugal Yforce of the same will expel the air or water at substantially right angles to the intake of the air or l@ water thereby producing a partial vacuum between the inner wall of the propeller and the volume of water or air so as to create a forward suction to impart movement to the ob] ect to which the propeller is attached.

Another object of my invention is the provision of a propeller of the above type which while not reversible is so constructed that with very little change in the device it can be used either in water or air and operate 5o equally as eflicient in one as in theother.

Another object of the invention is the provision of a propeller which includes in its construction a backing disc with a central shaft extending therethrough and the propeller blades carried by the shaft so that the action of the air or water is such that the fluid will enter the blades at the front and through centrifugal force be expelled over the peripheral edge of the blade before it 3:3 reaches the disc, thus creating a vacuum between the disc and the body of the blades so that the fluid will not come in contact with the body being propelled and reduced to a minimum the action of the air or water on the 3:31 body.

lith the above and other objects in view, the invention consists in the novel features of construction, the combination and arrangement of parts hereinafter more fully set 4o, forth, pointed out in the claim and shown in the accompanying drawings wherein:

, Figure l is a longitudinal section view through my improved propeller with parts in elevation;

Figure 2 is a transverse section on the line 2 2 of Figure 1; and

Figure 3 is a detail section on the line 3 3 of Figure 2.

Referring Vmore particularly to the draw- DI ings, it will be noted that the improved propeller is mounted upon shaft l, the outer end of which is lprovided with a circular head 2 bolted or otherwise secured to a disc 3. Longitudinally aligned with the shaft 1 is a tubular part l, the inner end of which is formed withan annular flange 5 adapted to be dis# posed between the head 2 and the disc 3 and secured. in position by means of the bolts 6 which are used for connecting the disc 3 to the head. l

n the' construction of the propeller, the

blades are preferably formed in pairs, notV portion which constitutes the blade 7 and 7 slightly curved as shown at 9.` The inner ends fof each of the blade members are provided with perforated lugs l0 which may be bolted or otherwise secured to the disc 3 in order to retain the blades in their proper relative position with respect to the tubular shaft 4t,

The blades'7 `and 7 adjacent their outer ends are connected by means of a band 11 which extends entirely around the propeller and is bolted or riveted to the curved portion 9 on allof the blade members, .thus the blade members are rigidly secured and retained in spaced relation with respect to each other as is clearly illustrated in Figure 2. This band ll may be ofany suitable width butis preferably narrow in order to offer. as little resistance as possible when the propeller is travelling through fluid. I

Then kusing the propeller on an airplane or where the propeller is to Contact with air only, the outer ends of theblades 7and 7 may be` left comparatively straight, but

where the propeller is used in water or fluid heavier than air, it is preferred to have themv slightly curved as shown at l2 so that the water` wllnotf be mpededin ,its Yprogress die ship when entering between the blades and not enter the blades with considerable shock 0r force and the action of the propeller, will have a tendency to cause the curved portion to cut a forward path in the water as the water enters inl between the propeller blades'. The centrifugal force of the propeller will cause the water to be directed outwardly o-ver the curved longitudinal edges of the blades before the water reaches thev disc 3,'thus creating a vacuum between the inner end of the propeller and the body to which the propelV` ler is attached so that the water will offer the least possible resistance to' the' bod-y pass-VA ing therethrough as the vacuum created by the" lateral discharge ofv the fluid' frein the blade's will have a tendency to drive the fluid frn' the body. This action also takes place whenx using the propeller as an air pro'` eller.

n" constructing the' propeller either' or use in wafter or as an a'ii" propeller', it' will be readily' apparent that the' axis as well' as: the 'blaft-lesI will necessarily have, to be longer' when constructing the device for' an' a'ir propeller as the action of the air is mueh faster than the heavier' water therefore, it will be necessary to'- extend tlie length of the' bla'd'e's" soy that thel centrifuga-l force will have atendency to discharge" the air' laterally' freni the blades beforel i-t` reaches the dise 3.A The propeller tofbeus'ed in water can be' considerably shorter as the slow action of tli'e water will* permit' the propeller' to discharge the saliney laterally from the blades" before it retenes the dise 3.

lin" order to close the outer' e'nd' of the tub'ulair shaftpar't 45,12 provide a plug `13Z having a 'conical capgportion le' which will have a t'en'dehyv to direct the' lfuid contaeti'ng therew'itl'r, betweenz the' blades 7 and 7. This'conical part lll will' offer very l'i-ttl'e resistance' to the ilui'dY through whieh'thef propeller is pass,-

a`^nd will materially assist in-Adii'rec'ti'ng'the iluid outwardly between the' propeller blades.

It will be apparent from the foregoing that have provided" a siinple and inexpensive propeller wherein' 'the' construction of thev ieg Steh gegrepen-lait the" blad-es to be' inan'uif-a-ctured a veryl lw` cost, all leven tlluglil tli'eblaide's' ri'tlie presentinsta'fn'ce iii-ay' be sl" as constructed inpafirs',- it will be apparent that' the blades can bef forn'ie d with each bladev4 connecte d'- to the shaft' part' 4, or morev than t'i'voblades I'nay be yf-'astened Oi tllecete'r' the' Shine Set f bolts' 1` rivets: Y y

It will also be apparent? that very little elange,the^ device can-be' used eqally as wen in wafer; 5ias an propeller; y

The disc 3 iiiay' be on the other' en'dofthe sha-ft which wouldy allow' the' propeller toV pla-ced at' the'back end ofthe ship and psli' the blades and connected to each blade for* closing. the inner' 'of thep'iopeller.

In vte'stiir'r'i'ythat' I e'l'a'ii'r'i the foregoing I have hereunto set my hand at Miami, in the county of Dade and State of Florida.

JOSEPH KOENIG. 

